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A155349
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 4,2 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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%I #3 Mar 31 2012 12:35:23
%S 1,7,19,37,100,428,1794,11180,68280,460602,3595480,35769940,408682401,
%T 5473453986,84561686844
%N Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 4,2 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
%e Maximal 10 X 10 X 10 example
%e ............0
%e ...........1.0
%e ..........1.0.0
%e .........0.1.1.1
%e ........0.0.0.0.1
%e .......0.1.0.0.1.0
%e ......0.0.1.0.0.0.0
%e .....1.1.1.0.0.0.1.1
%e ....1.0.0.0.1.0.1.0.1
%e ...0.1.0.0.0.1.1.0.0.0
%K nonn
%O 5,2
%A _R. H. Hardin_ Jan 22 2009
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